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A074861
Iccanobirt sequence: a(n) = R(a(n-1)) + R(a(n-2)) + R(a(n-3)) where a(1)=a(2)=a(3)=1 and R(n) (A004086) is the reverse of n.
2
1, 1, 1, 3, 5, 9, 17, 85, 138, 960, 958, 1759, 10499, 109831, 247873, 617044, 958359, 1773317, 8528346, 14525888, 102424570, 170715000, 164793813, 394338733, 656748025, 1177078610, 1027388860, 1378392568, 9510483643, 12805616091
OFFSET
1,4
LINKS
MATHEMATICA
nxt[{a_, b_, c_}]:={b, c, FromDigits[Reverse[IntegerDigits[a]]] + FromDigits[ Reverse[IntegerDigits[b]]] + FromDigits[ Reverse[ IntegerDigits[c]]]}; Transpose[NestList[nxt, {1, 1, 1}, 30]][[1]] (* Harvey P. Dale, Nov 13 2012 *)
CROSSREFS
Cf. A000213.
Sequence in context: A118330 A268212 A062221 * A281852 A120941 A108227
KEYWORD
easy,base,nonn
AUTHOR
Felice Russo, Sep 11 2002
EXTENSIONS
More terms from David Garber, Oct 23 2002
Definition adapted to offset by Georg Fischer, Jun 18 2021
STATUS
approved