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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 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,4 LINKS Harvey P. Dale, Table of n, a(n) for n = 1..1000 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 Adjacent sequences:  A074858 A074859 A074860 * A074862 A074863 A074864 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

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Last modified July 30 13:39 EDT 2021. Contains 346359 sequences. (Running on oeis4.)