A077173
Initial terms of rows of triangle in A077172.
Original entry on oeis.org
2, 1, 3, 7, 11, 15, 22, 29, 37, 44, 56, 67, 78, 92, 106, 119, 136, 154, 171, 188, 210, 230, 252, 275, 299, 323, 349, 375, 402, 430, 460, 491, 522, 555, 588, 623, 658, 694, 731, 769, 809, 849, 890, 932, 975, 1019, 1064, 1110, 1157, 1205, 1255
Offset: 1
A077174
Final terms of rows of triangle in A077172.
Original entry on oeis.org
2, 6, 5, 10, 16, 21, 28, 36, 48, 55, 66, 80, 91, 105, 121, 137, 153, 551, 190, 209, 231, 254, 1271, 298, 326, 3127, 1247, 47027, 432, 461, 2911, 3233, 1591, 590, 222017, 2867, 171749, 139019, 5183, 808, 21182921, 206753, 288569, 4331, 5767, 35139959
Offset: 1
A077175
Product of terms in n-th row of triangle in A077172.
Original entry on oeis.org
2, 6, 60, 5040, 384384, 36628200, 5967561600, 1220096908800, 350804594649600, 97292707463952000, 42873948150095462400, 21336925409736330240000, 11640487097965528951948800, 7998487694738166709923840000
Offset: 1
A077176
Largest squarefree number that divides A077175(n).
Original entry on oeis.org
2, 6, 30, 210, 6006, 67830, 690690, 35303730, 3383531970, 29248649430, 1846079805570, 220495674290430, 15231748284963210, 328001307608664690, 58030069605260142390, 4938238739984380540710, 182365421703667931839110
Offset: 1
Original entry on oeis.org
1, 1, 2, 24, 64, 540, 8640, 34560, 103680, 3326400, 23224320, 96768000, 764225280, 24385536000, 108391219200, 1097349120000, 29847896064000, 1631977611264000, 12384682168320000, 8034351316992000, 36502221127680000
Offset: 1
A101174
Triangle formed by grouping the natural numbers so that the n-th row contains n numbers whose product has exactly n prime divisors, minimizing (1) final term of row and (2) product of terms of row.
Original entry on oeis.org
2, 3, 4, 1, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16, 15, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 45, 48, 44, 46, 47, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72
Offset: 1
Triangle begins:
2
3,4
1,5,6
7,8,9,10
11,12,13,14,16
15,17,18,19,20,21
22,23,24,25,26,27,28
29,30,31,32,33,34,35,36
37,38,39,40,41,42,43,45,48
44,46,47,49,50,51,52,53,54,55
56,57,58,59,60,61,62,63,64,65,66
67,68,69,70,71,72,73,74,75,76,77,80
78,79,81,82,83,84,85,86,87,88,89,90,91
Showing 1-6 of 6 results.
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