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A102112
Iccanobirt numbers (2 of 15): a(n) = a(n-1) + R(a(n-2)) + a(n-3), where R is the digit reversal function A004086.
8
0, 0, 1, 1, 2, 4, 7, 13, 24, 62, 117, 167, 940, 1818, 2034, 11155, 17275, 74420, 142846, 162568, 885229, 1893336, 2978492, 10197702, 15039830, 38797423, 52888176, 100407789, 206394037, 1246986214, 2077887605, 6411178063, 12726051979
OFFSET
0,5
COMMENTS
Digit reversal variation of tribonacci numbers A000073.
Inspired by Iccanobif numbers: A001129, A014258-A014260.
LINKS
FORMULA
A004086(a(n)) = A102120(n).
MATHEMATICA
R[n_]:=FromDigits[Reverse[IntegerDigits[n]]]; Clear[a]; a[0]=0; a[1]=0; a[2]=1; a [n_]:=a[n]=a[n-1]+R[a[n-2]]+a[n-3]; Table[a[n], {n, 0, 40}]
nxt[{a_, b_, c_}]:={b, c, a+FromDigits[Reverse[IntegerDigits[b]]]+c}; Transpose[ NestList[nxt, {0, 0, 1}, 40]][[1]] (* Harvey P. Dale, Jul 29 2013 *)
CROSSREFS
KEYWORD
nonn,base,easy
AUTHOR
STATUS
approved