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A127007 a(n) = number of n-digit terms in A108571. 3
1, 1, 4, 5, 16, 82, 169, 541, 2272, 17965, 44407, 201751, 801515, 4890886, 52218595, 165519640, 835947970, 4290442728, 24096524166, 179566203960, 2739764737710, 9938147178960, 60997160143920, 331360222255920, 2154105076695000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

First 9 terms coincide with terms in A007837. Sum of all 45 terms gives the total number of terms in A108571: 66712890763701234740813164553708284.

LINKS

Zak Seidov, Table of n, a(n) for n = 1..45.

MATHEMATICA

a[n_, w_:{0}] := If[n == 0, Total[w]!/Times @@ (w!), Sum[a[n-k, Append[w, k]], {k, 1 + Last@w, Min[9, n]}]]; Array[a, 45] (* Giovanni Resta, May 19 2013 *)

CROSSREFS

Cf. A007837, A108571.

Sequence in context: A057729 A110278 A013628 * A007837 A032219 A032144

Adjacent sequences:  A127004 A127005 A127006 * A127008 A127009 A127010

KEYWORD

base,nonn

AUTHOR

Zak Seidov, Jan 02 2007

STATUS

approved

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Last modified May 26 09:42 EDT 2019. Contains 323579 sequences. (Running on oeis4.)