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A102124 Iccanobirt numbers (14 of 15): a(n) = R(R(a(n-1)) + R(a(n-2)) + a(n-3)), where R is the digit reversal function A004086. 6
0, 0, 1, 1, 2, 4, 7, 31, 42, 44, 99, 581, 823, 216, 1251, 6592, 3964, 98, 47311, 72451, 99862, 73698, 789881, 684873, 171146, 8359081, 2855313, 6626115, 92901661, 80528542, 25591874, 127303561, 518156392, 14745484, 711014964, 521206301 (list; graph; refs; listen; history; internal format)
OFFSET

0,5

COMMENTS

Digit reversal variation of Tribonacci numbers A000073.

Inspired by Iccanobif numbers: A001129, A014258-A014260.

FORMULA

a(n) = A004086(A102116(n)).

MATHEMATICA

R[n_]:=FromDigits[Reverse[IntegerDigits[n]]]; Clear[a]; a[0]=0; a[1]=0; a[2]=1; a [n_]:=a[n]=R[R[a[n-1]]+R[a[n-2]]+a[n-3]]; Table[a[n], {n, 0, 40}]

CROSSREFS

Cf. A102111-A102125.

Sequence in context: A102122 A102123 A102125 * A082537 A004577 A076719

Adjacent sequences:  A102121 A102122 A102123 * A102125 A102126 A102127

KEYWORD

nonn,base,easy

AUTHOR

Jonathan Vos Post (jvospost3(AT)gmail.com) and Ray Chandler (rayjchandler(AT)sbcglobal.net), Dec 30 2004

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Last modified February 17 02:48 EST 2012. Contains 205978 sequences.