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A004161 Tetrahedral numbers written backwards. 1
0, 1, 4, 1, 2, 53, 65, 48, 21, 561, 22, 682, 463, 554, 65, 86, 618, 969, 411, 331, 451, 1771, 4202, 32, 62, 5292, 6723, 4563, 604, 5944, 694, 6545, 4895, 5456, 417, 777, 6348, 9319, 889, 6601, 8411, 14321, 44231, 9141, 8151, 51261, 69271, 42481, 691, 52802 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

Sorted: 0, 1, 2, 4, 21, 22, 32, 48, 53, 62, 65, 86, 122, 307, 331, 411, 417, 451, 463, 554, 561, 604, 618, 682, 691, 694, 777, 889, 969, 1771, ..., . - Robert G. Wilson v, Feb 24 2010

LINKS

Alois P. Heinz, Table of n, a(n) for n = 0..10000

MAPLE

a:= n-> (s-> parse(cat(s[-i]$i=1..length(s))))(""||(binomial(n+2, 3))):

seq(a(n), n=0..50);  # Alois P. Heinz, Apr 09 2015

MATHEMATICA

f[n_] := FromDigits@ Reverse@ IntegerDigits[n (n + 1) (n + 2)/6]; Array[f, 49] (* Robert G. Wilson v, Feb 24 2010 *)

CROSSREFS

Cf. A000292.

Sequence in context: A072033 A159766 A280284 * A246070 A202778 A025016

Adjacent sequences:  A004158 A004159 A004160 * A004162 A004163 A004164

KEYWORD

nonn,base,look

AUTHOR

N. J. A. Sloane

EXTENSIONS

a(33)-a(49) from Robert G. Wilson v, Feb 24 2010

STATUS

approved

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Last modified March 30 05:12 EDT 2017. Contains 284297 sequences.