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A063177 Triangular spiral sequence: sequence is written as a triangular spiral, each entry is the sum of the row in the previous direction containing the previous entry. 3
1, 1, 2, 2, 5, 6, 6, 19, 22, 23, 23, 93, 101, 108, 110, 110, 545, 573, 601, 626, 632, 632, 3719, 3848, 3978, 4102, 4218, 4241, 4241, 28979, 29704, 30431, 31140, 31823, 32478, 32588, 32588, 253972, 258758, 263549, 268252, 272856, 277336, 281687 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..44.

F.M. van Lamoen, Spiral recurrence.

EXAMPLE

The spiral starts

............110

..........545.110

........573..2..108

......601..5...2..101

.........6...1...1..93

.......6...19..22..23..23

CROSSREFS

Cf. A062410, A063178.

Sequence in context: A209465 A209527 A054255 * A034803 A205885 A239262

Adjacent sequences:  A063174 A063175 A063176 * A063178 A063179 A063180

KEYWORD

nonn,nice

AUTHOR

Floor van Lamoen (fvlamoen(AT)hotmail.com), Jul 09 2001

STATUS

approved

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Last modified April 20 14:35 EDT 2014. Contains 240806 sequences.