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
A048530
Smallest oblong (promic) number containing exactly n 0's.
Original entry on oeis.org
0, 600, 10100, 390000, 1001000, 100030002, 100010000, 10000300002, 10000100000, 1000003000002, 1000001000000, 100000030000002, 100000010000000, 10000000300000002, 10000000100000000
Offset: 1
A048532
Smallest oblong (promic) number containing exactly n 1's.
Original entry on oeis.org
12, 110, 11130, 1021110, 104111412, 1151143112, 11141119152, 112311111512, 1111191111030, 151611114111162, 10115118111141192, 111017111111636112, 1111111811261716110, 18161111191151111150, 911115011111211111170, 17711116111217141111112, 110111041311117211111110
Offset: 1
A048534
Smallest oblong (promic) number containing exactly n 2's.
Original entry on oeis.org
2, 272, 20022, 210222, 2127222, 112222242, 1329222222, 222721228422, 222222202620, 12225222042222, 222922622262242, 22222622629269222, 222262242222052122, 22222222222226402, 222222624222746822222, 13222522222222257222852, 222222225263222925292272
Offset: 1
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
A048538
Smallest oblong (promic) number containing exactly n 4's.
Original entry on oeis.org
42, 4422, 46440, 464442, 44642442, 144444342, 40447444340, 2344449414440, 42794944444440, 443448440044440, 24442434644444460, 455758444444444440, 34444442714441644442, 44441704844441444442, 14444904404444444646450, 344407444483444494444942, 1244444414842444444444506
Offset: 1
A048540
Smallest oblong (promic) number containing exactly n 5's.
Original entry on oeis.org
56, 552, 5550, 5055752, 5255556, 552555542, 2555555256, 551555015556, 5555555065506, 515605555595550, 5558455555057550, 495553555055055552, 555055556595557556, 15975555555558555452, 5525459555405553555552, 59555925551555575555056, 255555555455525595515520
Offset: 1
A048542
Smallest oblong (promic) number containing exactly n 6's.
Original entry on oeis.org
6, 3660, 66306, 666672, 16666806, 6066462656, 66686606406, 666692662656, 20666666069660, 666676608666642, 10666051666666662, 664566666660662640, 666626669666607656, 6666086666606866662, 616766666966468666660, 66636666164666636562656, 1536666668666666766166056
Offset: 1
A048546
Smallest oblong (pronic) number containing exactly n 8's.
Original entry on oeis.org
182, 12882, 785882, 8188182, 84888582, 8808854880, 88835888862, 1848888788382, 8808848888870, 685888888859880, 48480888828288882, 187888888887248880, 11988898088888888862, 838843888888078888782, 1888988803808888888862, 521878088188888888888860, 888889828881888888587832
Offset: 1
A048548
Smallest oblong (promic) number containing exactly n 9's.
Original entry on oeis.org
90, 992, 792990, 4992990, 199699292, 919999892, 29939899992, 939969999920, 99179499990990, 999690999669990, 129990929999959950, 299899968999993990, 10999489909979999990, 299929969229995999992, 12999999959999499709890, 126994909999399899999990, 9399899999156999909995992
Offset: 1
Showing 1-10 of 10 results.