A068619 a(1) = 3; a(n+1) = smallest triangular number formed by inserting one or more digits into a(n).

3, 36, 136, 1326, 113526, 110283526, 1102583542690, 115025835237421690, 1145025835243794632181690

Offset

1,1

Comments

The sequence is the same if a(1) = 6.

Links

Table of n, a(n) for n=1..9.

Crossrefs

Cf. A068618.

Sequence in context: A275560 A213848 A006428 * A247768 A168075 A275085

Adjacent sequences: A068616 A068617 A068618 * A068620 A068621 A068622

Keyword

base,nonn,more

Author

Amarnath Murthy, Feb 25 2002

Extensions

a(5)-a(6) corrected and a(7) added by Max Alekseyev, Apr 25 2009

a(8)-a(9) from Max Alekseyev, Apr 26 2012, Feb 11 2018

Status

approved