A048543
a(n) is the smallest value of m such that A002378(m), the m-th oblong number, contains exactly n 7's.
Original entry on oeis.org
8, 108, 878, 870, 8813, 27924, 84129, 882483, 2788865, 7601169, 88190572, 421518419, 4204014483, 26034169427, 42305694389, 88022598108, 546605779129, 2788866736108, 69048807207508, 98844816642745, 88187696578, 2516, 5270458024477168, 26772616052167516, 166654612230648203, 521323093463907254
Offset: 1
From _Jesse Sealand_, Oct 05 2019: (Start)
a(1) = 8 since A002378(8) = 72;
a(2) = 108 since A002378(36) = 11772;
a(3) = 878 since A002378(182) = 771762;
a(4) = 870 since A002378(1817) = 757770, etc. (End)
-
def A048543(n):
k, m = 1, 2
while True:
if str(m).count('7') == n:
return k
k += 1
m += 2*k # Chai Wah Wu, Mar 23 2018
A048531
a(n) is the smallest value of m such that A002378(m), the m-th oblong number, contains exactly n 1's.
Original entry on oeis.org
3, 10, 105, 1010, 10203, 33928, 105551, 335128, 1054130, 12313046, 100573943, 333192303, 1054092885, 4261585525, 30184681729, 133083117303, 331829837885, 4136557897710, 11666683809854, 105410706823885, 333183899837885, 3333333637837885, 6466156610468989, 33928029520312720, 138242940872632303
Offset: 1
From _Jesse Sealand_, Oct 06 2019: (Start)
a(1) = 3 since A002378(3) = 12;
a(2) = 10 since A002378(10) = 110;
a(3) = 105 since A002378(105) = 11130;
a(4) = 1010 since A002378(1010) = 1021110, etc.
(End).
A048533
a(n) is the smallest value of m such that A002378(m), the m-th oblong number, contains exactly n 2's.
Original entry on oeis.org
1, 16, 141, 458, 1458, 10593, 36458, 471933, 471404, 3496458, 14930593, 149072541, 471446966, 149071198, 14907133333, 114989226548, 471404524016, 1510636363333, 14360440530228, 47140441472504, 149071332733333, 1490343155861166, 4712983368549333, 24955404665166666, 149070527690846966
Offset: 1
From _Jesse Sealand_, Oct 06 2019: (Start)
a(1) = 1 since A002378(1) = 2;
a(2) = 16 since A002378(16) = 272;
a(3) = 141 since A002378(141) = 20022;
a(4) = 458 since A002378(458) = 210222, etc.
(End).
A048537
a(n) is the smallest value of m such that A002378(m), the m-th oblong number, contains exactly n 4's.
Original entry on oeis.org
6, 66, 215, 681, 6681, 12018, 201115, 1531159, 6541784, 21058215, 156340764, 675098840, 5868938806, 6666461193, 120186956049, 586862372693, 1115546688777, 4176295540840, 66589372231193, 66634408865198, 210842150539318, 2108185118566309, 21011769217380159, 185591342591574215, 67412496945629038
Offset: 1
From _Jesse Sealand_, Oct 06 2019: (Start)
a(1) = 6 since A002378(6) = 42;
a(2) = 66 since A002378(66) = 4422;
a(3) = 215 since A002378(215) = 46440;
a(4) = 681 since A002378(681) = 464442, etc.
(End).
A048539
a(n) is the smallest value of m such that A002378(m), the m-th oblong number, contains exactly n 5's.
Original entry on oeis.org
7, 23, 74, 2248, 2292, 23506, 50552, 742667, 2357022, 22706949, 74555050, 703955648, 745020507, 3996943276, 74333434976, 244040827632, 505525029504, 5963015642907, 23548897033949, 156701172827632, 745354652534976, 758666893673274, 7453694087868501, 77198164845775648, 505525028614365003
Offset: 1
A048541
a(n) is the smallest value of m such that A002378(m), the m-th oblong number, contains exactly n 6's.
Original entry on oeis.org
2, 60, 257, 816, 4082, 77887, 258237, 816512, 4546060, 25820081, 103276578, 815209584, 816472087, 2581876578, 24834787435, 258140787487, 1239623599592, 7978512779247, 78515384904912, 121105886176546, 816494743559742, 6608227190863421, 8164653370882732, 81281404248860431, 81649676463937177
Offset: 1
From _Jesse Sealand_, Oct 07 2019: (Start)
a(1) = 2 since A002378(2) = 6;
a(2) = 60 since A002378(60) = 3660;
a(3) = 257 since A002378(257) = 66306;
a(4) = 816 since A002378(816) = 666672, etc.
(End).
A048545
a(n) is the smallest value of m such that A002378(m), the m-th oblong number, contains exactly n 8's.
Original entry on oeis.org
13, 113, 886, 2861, 9213, 93855, 298053, 1359738, 2967970, 26189480, 220183761, 433461519, 3462498821, 28962801813, 43462498821, 722411301260, 942809540088, 9049247973113, 29354537778480, 195230348268113, 1970200215432144, 2426703296418144, 2233582298883761, 93802389568778480, 242669917148548480
Offset: 1
From _Jesse Sealand_, Oct 07 2019: (Start)
a(1) = 13 since A002378(13) = 182;
a(2) = 113 since A002378(113) = 12882;
a(3) = 886 since A002378(886) = 785882;
a(4) = 2861 since A002378(2861) = 8188182, etc.
(End).
A048547
a(n) is the smallest value of m such that A002378(m), the m-th oblong number, contains exactly n 9's.
Original entry on oeis.org
9, 31, 890, 2234, 14131, 30331, 173031, 969520, 9958890, 31617890, 360542549, 547631234, 3316547890, 17318486343, 114017542334, 356363452109, 3065925634968, 9995498986343, 44045425415132, 173193446755643, 1414213562370264, 4471015432706534, 31575306806579083, 171463720944111031, 141138230008594765
Offset: 1
From _Jesse Sealand_, Oct 07 2019: (Start)
a(1) = 9 since A002378(9) = 90;
a(2) = 31 since A002378(31) = 992;
a(3) = 890 since A002378(890) = 792990;
a(4) = 2234 since A002378(2234) = 4992990, etc.
(End).
A048529
a(n) is the smallest value of m such that A002378(m), the m-th oblong number, contains exactly n 0's.
Original entry on oeis.org
0, 24, 100, 624, 1000, 10001, 10000, 100001, 100000, 1000001, 1000000, 10000001, 10000000, 100000001, 100000000, 1000000001, 1000000000, 10000000001, 10000000000
Offset: 1
From _Jesse Sealand_, Oct 05 2019: (Start)
a(1) = 0 since A002378(0) = 0;
a(2) = 24 since A002378(24) = 600;
a(3) = 100 since A002378(100) = 10100;
a(4) = 624 since A002378(624) = 390000, etc.
(End).
-
a[n_] := Block[{a = 0}, While[Count[IntegerDigits[a*(a + 1)], 0] != n, ++a]; Return[a]]; a /@ Range[1, 10] (* Julien Kluge, Dec 15 2016 *)
A048536
Smallest oblong (promic) number containing exactly n 3's.
Original entry on oeis.org
30, 1332, 33306, 3303306, 23333730, 33333302, 23433333320, 333339373380, 13393363833330, 337333336323132, 33333334306433532, 332333844339333332, 3383333633731033332, 313337139333377333330, 1335333331339333343030, 236133338333333323833132, 3293333837330583333333332
Offset: 1
Showing 1-10 of 11 results.