A218390 Triangular numbers composed of digits {0,2,4}.

40002040, 2442040424202042204020040, 24202244424402424242222220, 200020020000400442044244444400204400200

Offset

1,1

Comments

a(5) > 10^40.

Links

Table of n, a(n) for n=1..4.

Giovanni Resta, Tridigital Triangular Numbers.

Formula

a(n) = A000217(A218389(n)).

Crossrefs

Cf. A000217, A218389. See A119033 for a table of cross-references.

Sequence in context: A198809 A181727 A307477 * A186617 A186960 A186571

Adjacent sequences: A218387 A218388 A218389 * A218391 A218392 A218393

Keyword

base,nonn,more

Author

Max Alekseyev, Oct 27 2012

Status

approved