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A085988 Triangle of least prime signatures such that T(1,1)= 1; T(r,j) = 2*T(r,j-1) for j>1 and T(r+1,1) is the smallest value in A025487 not appearing on an earlier row. 2
1, 2, 4, 6, 12, 24, 8, 16, 32, 64, 30, 60, 120, 240, 480, 36 (list; table; graph; refs; listen; history; internal format)
OFFSET

1,2

EXAMPLE

The table begins

1

2 4

6 12 24

8 16 32 64

30 60 120 240 480

36 ...

CROSSREFS

Cf. A056153, A062515.

Sequence in context: A196700 A135231 A030793 * A073349 A129301 A066523

Adjacent sequences:  A085985 A085986 A085987 * A085989 A085990 A085991

KEYWORD

easy,nonn,tabl

AUTHOR

Alford Arnold (Alford1940(AT)aol.com), Jul 12 2003

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Last modified February 14 23:53 EST 2012. Contains 205689 sequences.