A075003 Floor[ concatenation of n+1 and n divided by 2 ].

5, 10, 16, 21, 27, 32, 38, 43, 49, 54, 555, 605, 656, 706, 757, 807, 858, 908, 959, 1009, 1060, 1110, 1161, 1211, 1262, 1312, 1363, 1413, 1464, 1514, 1565, 1615, 1666, 1716, 1767, 1817, 1868, 1918, 1969, 2019, 2070, 2120, 2171, 2221, 2272, 2322, 2373, 2423

Offset

0,1

Links

Table of n, a(n) for n=0..47.

Example

Sequence exhibits similar properties to A074993.

Maple

seq(floor((n*10+(n-1))/2), n=1..10), seq(floor((n*100+(n-1))/2), n=11..99);

Crossrefs

Cf. A074991 to A075000 and A075004 to A075010.

Sequence in context: A276853 A178181 A277645 * A313895 A313896 A313897

Adjacent sequences: A075000 A075001 A075002 * A075004 A075005 A075006

Keyword

base,nonn

Author

Amarnath Murthy, Sep 01 2002

Extensions

More terms from Sascha Kurz, Jan 14 2003

Status

approved