A265906 a(n) = A153880(A265905(n)); also the first differences of A265905.

2, 8, 38, 242, 1688, 13238, 121442, 1212968, 13211798, 160076282, 2080120448, 28952201678, 436718865962, 6985509376688, 118290516617198, 2137197890239202, 40600129761103688, 809755594446845558, 17050115848925513762, 375062123907891088808, 8608573107134508912038, 207014026157802769184402, 5174962975935097945559048

Offset: 1

Author

Antti Karttunen, Dec 20 2015

Keywords

• nonn
• base

Comments

In factorial base (A007623) these numbers are just like those in A265905, but shifted once left, with an extra zero appended:

10, 110, 1210, 20010, 220110, 2421210, 30040010, 330440110, 3635241210, 40111110010, 441222210110, 4853444311210, 50188010430010, , ...

Links

• Antti Karttunen, Table of n, a(n) for n = 1..120
• Index entries for sequences related to factorial base representation

Crossrefs

Row 2 of A275950.

First differences of A265905.

Cf. A007623, A153880.

Formula

a(n) = A153880(A265905(n)).

a(n) = A265905(n+1) - A265905(n).