A053064 Alternately append n to end or beginning of previous term.

1, 12, 312, 3124, 53124, 531246, 7531246, 75312468, 975312468, 97531246810, 1197531246810, 119753124681012, 13119753124681012, 1311975312468101214, 151311975312468101214, 15131197531246810121416, 1715131197531246810121416, 171513119753124681012141618

Offset

1,2

Comments

A055642(a(n)) = A058183(n); A007953(a(n)) = A037123(n); A010879(a(n)) = A010879(2*floor(n/2)) = A010879(A131055(n)); A000030(a(n)) = A000030(ceiling(n/2)). - Reinhard Zumkeller, Oct 10 2008

References

Felice Russo, A set of new Smarandache functions, sequences and conjectures in number theory, American Research Press 2000

Links

R. Zumkeller, Table of n, a(n) for n = 1..100

Crossrefs

Cf. A007908, A053063.

Sequence in context: A052795 A304126 A263668 * A171094 A060010 A129583

Adjacent sequences: A053061 A053062 A053063 * A053065 A053066 A053067

Keyword

easy,nonn,base,less

Author

Felice Russo, Feb 25 2000

Extensions

More terms from Sean A. Irvine, Dec 05 2021

Status

approved