A247878 - cp's OEIS frontend

A247878 For bases b = 2, 3, ..., n, let the base-b expansion of n be [c_{1,b} c_{2,b} .. c_{r_b,b}], with the most significant "digit" on the left, 0 <= c_{i,b} < b, and c_{1,b} != 0; then a(n) is the number whose base-n expansion is c_{1,2} c_{2,2} ... c_{r_2,2} c_{1,3} ... c_{1,n} c_{2,n} ... c_{r_n,n}.

n	a(n)
2	2
3	39
4	4180
5	410780
6	71114370
7	16188759706
8	35203970802248
9	150323470036510005
10	101010122201413121110
11	82142319855341886460705
12	86125744399762145472931164
13	98834976539539763693131785850
14	132929923088954538537350244463306
15	205447801545228436007113806273864240

[2, 39, 4180, 410780, 71114370, 16188759706, 35203970802248, 150323470036510005, 101010122201413121110, 82142319855341886460705, 86125744399762145472931164, 98834976539539763693131785850, 132929923088954538537350244463306, 205447801545228436007113806273864240]

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