A102119 Iccanobirt numbers (9 of 15): a(n) = R(a(n-1) + a(n-2) + R(a(n-3))), where R is the digit reversal function A004086.

0, 0, 1, 1, 2, 4, 7, 31, 24, 26, 36, 401, 994, 8541, 9369, 90481, 803101, 122309, 918349, 6691411, 1892158, 8837259, 38317811, 15086655, 45813926, 46917727, 407993841, 224348715, 25411507, 629951893, 2286023711, 6507846892, 9250302919

Offset

0,5

Comments

Digit reversal variation of tribonacci numbers A000073.

Inspired by Iccanobif numbers: A001129, A014258-A014260.

Links

Table of n, a(n) for n=0..32.

Formula

a(n) = A004086(A102111(n)).

Mathematica

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

Crossrefs

Cf. A102111-A102125.

Sequence in context: A242020 A047904 A102118 * A102121 A102120 A280820

Adjacent sequences: A102116 A102117 A102118 * A102120 A102121 A102122

Keyword

nonn,base,easy

Author

Jonathan Vos Post and Ray Chandler, Dec 30 2004

Status

approved