A102167 Lightest finite strictly increasing sequence of integers showing once and only once every pair of digits from [00] to [99]. The "weight" of such a sequence is the sum of all its a(n). Weight of this sequence is 2995.

7, 19, 20, 23, 24, 25, 26, 27, 28, 29, 30, 34, 35, 36, 37, 38, 39, 40, 45, 46, 47, 48, 49, 50, 56, 57, 58, 59, 60, 67, 68, 69, 70, 78, 79, 80, 88, 90, 99, 100, 118, 122, 133, 144, 155, 166, 177

Offset

1,1

Comments

It seems that it is only a conjecture that this sequence is really the lightest! - N. J. A. Sloane, Mar 15 2005

Links

Table of n, a(n) for n=1..47.

Example

Sequence starts with 7 19 20 23... showing pairs [71], [19], [92], [20], [02], [23]...

Crossrefs

Sequence in context: A052256 A064819 A281915 * A214525 A372539 A109637

Adjacent sequences: A102164 A102165 A102166 * A102168 A102169 A102170

Keyword

base,easy,nonn,fini,full

Author

Geoff Bailey, Richard Tucker, "Alex" and Eric Angelini, Feb 16 2005; revised Mar 15 2005

Status

approved