A061521 a(0) = 1; a(n) is obtained by incrementing each digit of a(n-1) by 6.

1, 7, 13, 79, 1315, 79711, 13151377, 79711791313, 1315137713157979, 797117913137971113151315, 1315137713157979131513777971179711, 797117913137971113151315797117913131315137713151377, 131513771315797913151377797117971113151377131579797971179131379711791313

Offset: 0

Author

Amarnath Murthy, May 08 2001

Keywords

• base
• nonn

Comments

In A061511-A061522, A061746-A061750 when the incremented digit exceeds 9 it is written as a 2-digit string. So 9+1 becomes the 2-digit string 10, etc.

Programs

Mathematica

NestList[FromDigits[Flatten[IntegerDigits/@(IntegerDigits[#]+6)]]&,1,15] (* Harvey P. Dale, May 21 2015 *)

Extensions

More terms from Larry Reeves (larryr(AT)acm.org), May 11 2001

a(5)-a(12) corrected by Harvey P. Dale, May 21 2015